Sewing machine



FIG. 1 is a top plan view of a sewing machine embodying our design;

FIG. 2 is a left side elevational view of a sewing machine embodying our design;

FIG. 3 is a bottom plan view of a sewing machine embodying our design;

FIG. 4 is a front elevational view of a sewing machine embodying our design;

FIG. 5 is a rear elevational view of a sewing machine embodying our design;

FIG. 6 is a right side elevational view of a sewing machine embodying our design; and,

FIG. 7 is a left isometric view of a sewing machine embodying our design. 

The ornamental design for a sewing machine, as shown and described. 